AgentComputerScaffold
@Composable
Lays out content (a conversation) with the agent's computer view of state: by default (AgentComputerLayout.Auto) a side pane next to it when there is room (at least 720dp, as Material 3's supporting pane on expanded widths), a bottom sheet otherwise. The width is the scaffold's own, so it adapts inside a list–detail layout too; an app that has an adaptive scaffold of its own hosts the panel there (AgentComputerLayout.Hosted).